package com.hyb.CommonUtil;

import io.jsonwebtoken.Claims;
import io.jsonwebtoken.Jws;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;
import org.springframework.util.StringUtils;
import javax.servlet.http.HttpServletRequest;
import java.util.Date;
/**
 * @author
 */
public class JwtUtils {
    //过期时间
    public static final long EXPIRE = 1000 * 60 * 60 * 24;
    //秘钥
    public static final String APP_SECRET = "ukc8BDbRigUDaY6pZFfWus2jZWLPHO";

    public static String getJwtToken(String id, String nickname){
        String JwtToken = Jwts.builder()
                //jwt头部信息
                .setHeaderParam("typ", "JWT")
                .setHeaderParam("alg", "HS256")
                //设置过期时间
                .setSubject("guli-user")
                .setIssuedAt(new Date())
                .setExpiration(new Date(System.currentTimeMillis() + EXPIRE))

                //用户信息,主题部分
                .claim("id", id)
                .claim("nickname", nickname)
                //编码信息,签名哈希,防伪标志
                .signWith(SignatureAlgorithm.HS256, APP_SECRET)
                .compact();
        return JwtToken;
    }
    /**
     * 判断token是否存在与有效
     * @param jwtToken
     * @return
     */
    public static boolean checkToken(String jwtToken) {
        if(StringUtils.isEmpty(jwtToken)) return false;
        try {
            //根据自己设定的秘钥判断token是否有效
            Jwts.parser().setSigningKey(APP_SECRET).parseClaimsJws(jwtToken);
        } catch (Exception e) {e.printStackTrace();
            return false;
        }
        return true;
    }
    /**
     * 判断token是否存在与有效
     * @param request
     * @return
     */
//    public static boolean checkToken(HttpServletRequest request) {
//        try {
//            String jwtToken = request.getHeader("token");
//            if(StringUtils.isEmpty(jwtToken)) return false;
//            Jwts.parser().setSigningKey(APP_SECRET).parseClaimsJws(jwtToken);
//        } catch (Exception e) {
//            e.printStackTrace();
//            return false;
//        }
//        return true;
//    }
    /**
     * 根据token获取会员id
     * @param request
     * @return
     */
    public static String getMemberIdByJwtToken(HttpServletRequest request) {
        String jwtToken = request.getHeader("token");
        if(StringUtils.isEmpty(jwtToken)) return "";
        Jws<Claims> claimsJws =
                Jwts.parser().setSigningKey(APP_SECRET).parseClaimsJws(jwtToken);
        Claims claims = claimsJws.getBody();
        return (String)claims.get("id");
    }
//    public static Claims getMemberClaims(HttpServletRequest request) {
//        String jwtToken = request.getHeader("token");
//        if(StringUtils.isEmpty(jwtToken))
//            return null;
//        Jws<Claims> claimsJws =
//                Jwts.parser().setSigningKey(APP_SECRET).parseClaimsJws(jwtToken);
//        return claimsJws.getBody();
//
//    }
    public static Claims getMemberClaims(String jwtToken) {
        if(StringUtils.isEmpty(jwtToken))
            return null;
        Jws<Claims> claimsJws =
                Jwts.parser().setSigningKey(APP_SECRET).parseClaimsJws(jwtToken);
        return claimsJws.getBody();

    }

    public static String getMemberIdByJwtTokenByHeader(String header) {
        String jwtToken = header;
        if(StringUtils.isEmpty(jwtToken)) return "";
        Jws<Claims> claimsJws =
                Jwts.parser().setSigningKey(APP_SECRET).parseClaimsJws(jwtToken);
        Claims claims = claimsJws.getBody();
        return (String)claims.get("id");
    }
}
